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https://www.readbyqxmd.com/read/27861651/the-influence-of-bone-quality-on-the-biomechanical-behavior-of-a-tooth-implant-fixed-partial-denture-a-three-dimensional-finite-element-analysis
#1
Alexander Tsouknidas, Dimitrios Giannopoulos, Savvas Savvakis, Nikolaos Michailidis, Evdokia Lympoudi, Dimitrios Fytanidis, Argirios Pissiotis, Konstantinos Michalakis
PURPOSE: The purpose of this study was to evaluate whether or not bone quality has an effect on the biomechanical behavior of a tooth connected to an implant, when a rigid and a nonrigid attachment are used. MATERIALS AND METHODS: Models of fixed partial dentures supported by a tooth and an implant were developed. These models were then imported into finite element analysis software to study the impact of forces on different types of attachments (rigid vs nonrigid) and bones (types 1 to 4)...
November 2016: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/27859471/volumetric-changes-at-pontic-sites-with-or-without-soft-tissue-grafting-a-controlled-clinical-study-with-a-10-year-follow-up
#2
Stefan P Bienz, Irena Sailer, Ignacio Sanz-Martin, Ronald E Jung, Christoph H F Hämmerle, Daniel S Thoma
OBJECTIVE: to evaluate volumetric changes of soft tissues at pontic sites in patients treated with or without soft tissue grafting over an observation period of 10 years. MATERIALS AND METHODS: A total of 17 patients receiving a tooth-borne fixed dental prosthesis (FDP) were enrolled in this study. Nine patients received a subepithelial connective tissue graft at the pontic site (test). Eight patients continued without soft tissue grafting (control). Baseline impressions were taken after delivery of the final FDP and at 10 years...
November 17, 2016: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/27824975/analysis-of-endodontic-complications-following-fixed-prosthodontic-rehabilitation
#3
Zeynep Uzgur, Recep Uzgur, Hakan Çolak, Ertuğrul Ercan, Mehmet Dallı
PURPOSE: The aim of this study was to determine endodontic treatment needs and types of endodontic disease following fixed prosthodontic treatment 24 hours after tooth preparation, 1 week after tooth preparation, 1 month after placement, and 6 months after placement. MATERIALS AND METHODS: Study groups consisted of patients who attended a university dental hospital department of prosthodontics for fixed prosthodontic treatment from January 2011 to December 2013...
November 2016: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/27803981/genetic-structure-of-the-early-hungarian-conquerors-inferred-from-mtdna-haplotypes-and-y-chromosome-haplogroups-in-a-small-cemetery
#4
Endre Neparáczki, Zoltán Juhász, Horolma Pamjav, Tibor Fehér, Bernadett Csányi, Albert Zink, Frank Maixner, György Pálfi, Erika Molnár, Ildikó Pap, Ágnes Kustár, László Révész, István Raskó, Tibor Török
We applied ancient DNA methods to shed light on the origin of ancient Hungarians and their relation to modern populations. Hungarians moved into the Carpathian Basin from the Eurasian Pontic steppes in the year 895 AD as a confederation of seven tribes, but their further origin remains obscure. Here, we present 17 mtDNA haplotypes and four Y-chromosome haplogroups, which portray the genetic composition of an entire small cemetery of the first generation Hungarians. Using novel algorithms to compare these mitochondrial DNA haplogroups with other ancient and modern Eurasian data, we revealed that a significant portion of the Hungarians probably originated from a long ago consolidated gene pool in Central Asia-South Siberia, which still persists in modern Hungarians...
November 1, 2016: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/27783438/precise-placement-of-single-retainer-resin-bonded-fixed-dental-prostheses-with-an-innovative-splint-design
#5
Michael Stimmelmayr, Martin Stangl, Judith Kremzow-Stangl, Gerald Krennmair, Florian Beuer, Daniel Edelhoff, Jan-Frederik Güth
Single-retainer resin-bonded fixed dental prostheses (RBFDPs) are difficult to position due to the pressure of soft tissue at the pontic area and the single-retainer design. This clinical report describes an innovative technique for the insertion of single-retainer RBFDPs. An incisal inserting splint is used to position the RBFDPs reliably. With the help of grooves in the buccal and incisal area of the splint, the precise positioning of the splint on the adjacent teeth and the RBFDP can be controlled. Also, a hole in the retainer wing region of the splint gives access for pressure application on the wing during the bonding process...
October 26, 2016: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/27747645/a-piezo-surgery-with-corticotomies-and-implant-placement-as-part-of-a-multidisciplinary-approach-to-treat-malocclusion-disorder-in-an-adult-patient-clinical-report
#6
Federico Gelpi, Daniele De Santis, Simone Marconcini, Francesco Briguglio, Marco Finotti
This clinical report illustrates a multidisciplinary approach for the rehabilitation of a young adult patient affected by a bilateral edentulous space and an anterior deep bite. The patient required orthodontics and surgical corticotomy and implantology (both performed with a piezo device). A multidisciplinary planning approach, including orthodontics, oral and periodontic surgery, and restorative dentistry, has an important role in the final outcome of treatment. In fact a dental class I occlusion has been established only on the right side...
December 2015: Int J Implant Dent
https://www.readbyqxmd.com/read/27746602/knowledge-attitude-and-practice-of-dental-professionals-regarding-the-effect-and-management-of-food-impaction-associated-with-fixed-partial-denture-prostheses-a-survey
#7
Aradhana Nagarsekar, Ridhima Gaunkar, Meena Aras
OBJECTIVE: This survey was undertaken to assess dentist's opinion regarding the occurrence and pattern of food impaction in relation to fixed partial denture (FPD) prostheses, its commonly observed consequences, factors contributing to it, and its management. METHODS: A descriptive survey was conducted on a sample size of 150 dental practitioners. The pro forma consisted of informed consent, demographic information, and questionnaire. The results were tallied and quantitative analysis was performed to obtain the descriptive statistics for the data using SPSS version 20...
October 2016: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/27740655/fracture-strength-failure-types-and-weibull-characteristics-of-three-unit-zirconia-fixed-dental-prostheses-after-cyclic-loading-effects-of-veneering-and-air-abrasion-protocols
#8
Fernanda Campos, Rodrigo Oa Souza, Marco A Bottino, Mutlu Özcan
The required connector dimension for zirconia fixed dental prostheses (FDPs) may be a clinical limitation due to limited space in the occlusogingival direction. Using no veneering in the gingival regions of the pontics and connectors may solve this problem. This study evaluated the mechanical durability of zirconia FDPs with and without veneering in the gingival area of the connectors and pontics and subsequent air abrasion of this region with different protocols. Models were made of resin abutments (diameter = 6 or 8 mm, height = 6 mm, 6 degrees convergence) and embedded in polyurethane resin (distance = 11 mm)...
November 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27680671/survival-and-failure-modes-platform-switching-for-internal-and-external-hexagon-cemented-fixed-dental-prostheses
#9
Rodolfo B Anchieta, Lucas S Machado, Ronaldo Hirata, Paulo G Coelho, Estevam A Bonfante
This study evaluated the probability of survival (reliability) of platform-switched fixed dental prostheses (FDPs) cemented on different implant-abutment connection designs. Eighty-four-three-unit FDPs (molar pontic) were cemented on abutments connected to two implants of external or internal hexagon connection. Four groups (n = 21 each) were established: external hexagon connection and regular platform (ERC); external hexagon connection and switched platform (ESC); internal hexagon and regular platform (IRC); and internal hexagon and switched platform (ISC)...
October 2016: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/27632259/an-in-vivo-study-on-load-distribution-in-different-implant-configurations-for-supporting-fixed-partial-dentures
#10
Hiromori Kobari, Nobuhiro Yoda, Junning Chen, Tetsuo Kawata, Keiichi Sasaki
PURPOSE: The aims of this study were to develop a device for in vivo measurement of three-dimensional (3D) loads on implants and to investigate the effects of implant configuration on the load distribution under a three-unit fixed partial denture (FPD). MATERIALS AND METHODS: A 67-year-old female patient with three implants (in the mandibular left second premolar, first molar, and second molar regions) was recruited. Four implant configurations for a three-unit FPD depending on the number and position of the implants were considered in this study...
September 2016: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/27628910/simulation-of-multi-stage-nonlinear-bone-remodeling-induced-by-fixed-partial-dentures-of-different-configurations-a-comparative-clinical-and-numerical-study
#11
Zhipeng Liao, Nobuhiro Yoda, Junning Chen, Keke Zheng, Keiichi Sasaki, Michael V Swain, Qing Li
This paper aimed to develop a clinically validated bone remodeling algorithm by integrating bone's dynamic properties in a multi-stage fashion based on a four-year clinical follow-up of implant treatment. The configurational effects of fixed partial dentures (FPDs) were explored using a multi-stage remodeling rule. Three-dimensional real-time occlusal loads during maximum voluntary clenching were measured with a piezoelectric force transducer and were incorporated into a computerized tomography-based finite element mandibular model...
September 15, 2016: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/27621552/soft-tissue-development-around-pontic-site-a-case-series
#12
Sarita Joshi Narayan, Pranav Kumar Singh, Achut R Devarhubli, R Keerthi
An ideal emergence profile is vital for maintaining gingival health and developing esthetics. The ovate pontic which mimics a natural tooth gives the most appropriate emergence profile. For a successful ovate pontic restoration, an alveolar ridge of sufficient height and width is necessary to enhance the deficient ridge and to achieve an esthetic emergence profile. Interpositional graft was carried out along with ovate pontic to achieve an ideal esthetic restoration. After three months of the postoperative period, there was an increased horizontal dimension in the deficient ridge and an esthetic emergence profile...
July 2016: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/27621545/the-effectiveness-of-adding-a-supporting-implant-in-stress-distribution-of-long-span-fixed-partial-denture-three-dimensional-finite-element-analysis
#13
Rami Shurbaji Mozayek, Mohammad Yamen Shurbaji Mozayek, Mirza Allaf, Mohammad Bassam Abouharb
CONTEXT AND AIMS: Long span is seen in many clinical situations; treatment planning options of these cases are difficult and may require: Fixed partial denture (FPD), removable partial denture, or implant supported prostheses. Each option has its own disadvantages: Mechanical, patient relief, and cost, respectively. This article will evaluate the stress distribution of another treatment option, which is adding a single supporting implant to the FPD using three-dimensional (3D) finite element analysis...
July 2016: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/27560672/partial-extraction-therapies-pet-part-1-maintaining-alveolar-ridge-contour-at-pontic-and-immediate-implant-sites
#14
Howard Gluckman, Maurice Salama, Jonathan Du Toit
Buccopalatal collapse of the postextraction ridge is a significant challenge in restorative and implant dentistry. A variety of ridge preservation techniques using tissue and augmentative materials have been proposed in the literature. A slightly different approach is to use the tooth itself. Root submergence has been reported in the literature for more than 4 decades, and it has been demonstrated that the submerged tooth root retains the periodontal tissues and preserves the bone in pontic sites or below dentures to retain the ridge...
September 2016: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/27547517/pleistocene-phylogeography-and-cryptic-diversity-of-a-tiger-beetle-calomera-littoralis-in-north-eastern-mediterranean-and-pontic-regions-inferred-from-mitochondrial-coi-gene-sequences
#15
Radomir Jaskuła, Tomasz Rewicz, Mateusz Płóciennik, Michał Grabowski
Background. Calomera littoralis is a Palearctic species, widely distributed in Europe; inhabiting predominantly its Atlantic, Mediterranean and Black Sea coastlines. Methods. Its phylogeography on the Balkan Peninsula and on the north-western Black Sea coast was inferred using a 697 bp long portion of the mitochondrial COI gene, amplified from 169 individuals collected on 43 localities. Results. The results revealed two genetically divergent groups/lineages, the southern one inhabiting both the Balkan Peninsula and the Pontic Region and the northern one found exclusively in the Pontic Region...
2016: PeerJ
https://www.readbyqxmd.com/read/27475921/modified-peek-resin-bonded-fixed-dental-prosthesis-as-an-interim-restoration-after-implant-placement
#16
Panagiotis Zoidis, Ioannis Papathanasiou
A polyetheretherketone (PEEK) (BioHPP) framework veneered with composite resin was used as an alternative material for the fabrication of an interim 3-pontic resin-bonded fixed dental prosthesis (RBFDP) after implant placement. The low modulus of elasticity (4 GPa) of PEEK combined with the use of indirect light-polymerized resin as a veneering material used for a RBFDP provided an advantage over metal ceramics or ceramics in dampening the occlusal forces and reducing debonding rates. Further long-term clinical evidence is required before recommending the application as a substitute material...
July 28, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27450782/phylogeographic-analyses-reveal-transpontic-long-distance-dispersal-in-land-snails-belonging-to-the-caucasotachea-atrolabiata-complex-gastropoda-helicidae
#17
Marco T Neiber, Christina Sagorny, Jan Sauer, Frank Walther, Bernhard Hausdorf
The phylogeography and population structure of land snails belonging to the Caucasotachea atrolabiata complex in the Caucasus region was investigated to obtain a better understanding of diversification processes in this biodiversity hotspot. So far the complex has been classified into three species, C. atrolabiata from the north-western Caucasus, C. calligera from Transcaucasia and C. intercedens from the eastern Pontus Mountains. Phylogenetic (neighbor-net and neighbor-joining tree) as well as admixture analyses based on AFLP data showed that the complex consists of two population clusters corresponding to C...
October 2016: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/27447000/effect-of-endodontic-access-cavity-preparation-on-monolithic-and-ceramic-veneered-zirconia-restorations
#18
Tanja Grobecker-Karl, Mirko Christian, Matthias Karl
OBJECTIVES: Due to the high chipping rates observed in veneered zirconia ceramic restorations, the use of monolithic zirconia restorations has been recommended. This study tried to compare veneered and monolithic zirconia fixed dental prostheses (FDPs) with respect to the amount of damage induced by endodontic access preparation. METHOD AND MATERIALS: Monolithic and ceramic veneered (n = 10) three-unit restorations (retainers: first premolar and first molar; pontic: second premolar) were subject to endodontic access cavity preparation in both retainers using a diamond rotary instrument under continuous water cooling...
2016: Quintessence International
https://www.readbyqxmd.com/read/27433074/natural-tooth-as-an-interim-prosthesis
#19
Neha S Dhariwal, Niraj S Gokhale, Punit Patel, Shivayogi M Hugar
A traumatic injury to primary maxillary anterior tooth is one of the common causes for problems with the succedaneous tooth leading to it noneruption. A missing anterior tooth can be psychologically and socially damaging to the patient. Despite a wide range of treatment options available, sometimes, it is inevitable to save the natural tooth. This paper describes the immediate replacement of a right central incisor using a fiber-composite resin splint with the natural tooth crown as a pontic following surgical extraction of the dilacerated impacted permanent maxillary central incisor...
July 2016: Journal of Natural Science, Biology, and Medicine
https://www.readbyqxmd.com/read/27429723/efficacy-of-adding-a-supporting-implant-in-stress-distribution-of-long-span-fixed-partial-dentures-a-3d-finite-element-analysis
#20
Rami Shurbaji Mozayek, Mirza Allaf, Mohammad B Abuharb
Background. Long span is seen in many clinical situations. Treatmentplanning options of these cases are difficult and may require FPD, RPD or ISP. Each option has its own disadvantages, including mechanical problems, patient comfort and cost. This article will evaluate the stress distribution of a different treatment option, which consists of adding a single sup-porting implant to the FPD by using 3D finite element analysis. Methods. Three models, each consisting of 5 units, were created as follows: 1. Tooth Pontic Pontic Pontic Tooth; 2...
2016: Journal of Dental Research, Dental Clinics, Dental Prospects
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